Age at baseline (y), n (%) | | | | | |
36–37 | 90 (14.9) | 62 (15.5) | 11 (15.1) | 11 (13.1) | 6 (13.0) |
38–39 | 162 (26.9) | 108 (27.0) | 22 (30.1) | 19 (22.6) | 13 (28.3) |
40–41 | 137 (22.7) | 96 (24.0) | 14 (19.2) | 15 (17.9) | 12 (26.1) |
42–43 | 153 (25.4) | 93 (23.2) | 22 (30.1) | 28 (33.3) | 10 (21.7) |
44–45 | 61 (10.1) | 41 (10.3) | 4 (5.5) | 11 (13.1) | 5 (10.9) |
Age at menarche (y), n (%) | | | | | |
<12 | 99 (16.4) | 62 (15.5) | 10 (13.7) | 16 (19.1) | 11 (23.9) |
12–14 | 438 (72.6) | 296 (74.0) | 55 (75.3) | 60 (71.4) | 27 (58.7) |
>14 | 66 (11.0) | 42 (10.5) | 8 (11.0) | 8 (9.5) | 8 (17.4) |
Oral contraceptive use (y), n (%) | | | | | |
Never use | 183 (30.4) | 123 (30.8) | 23 (31.5) | 26 (30.9) | 11 (23.9) |
1–5 | 295 (48.9) | 196 (49.0) | 32 (43.9) | 42 (50.0) | 25 (54.4) |
6–11 | 85 (14.1) | 50 (12.5) | 16 (21.9) | 13 (15.5) | 6 (13.0) |
>11 | 40 (6.6) | 31 (7.7) | 2 (2.7) | 3 (3.6) | 4 (8.7) |
Parity, n (%) | | | | | |
Nulliparous | 206 (34.2) | 140 (35.0) | 25 (34.2) | 28 (33.3) | 13 (28.3) |
1–2 livebirths | 284 (47.1) | 184 (46.0) | 37 (50.7) | 37 (44.1) | 26 (56.5) |
≥3 livebirths | 113 (18.7) | 76 (19.0) | 11 (15.1) | 19 (22.6) | 7 (15.2) |
Race/ethnicity, n (%)† | | | | | |
White, non-Hispanic women | 570 (94.5) | 382 (95.5) | 69 (94.5) | 76 (90.5) | 43 (93.5) |
Women of colour, including Hispanic | 33 (5.5) | 18 (4.5) | 4 (5.5) | 8 (9.5) | 3 (6.5) |
Family history of early menopause, n (%)‡ | 46 (7.6) | 29 (7.3) | 10 (13.7) | 3 (3.6) | 3 (8.7) |
Removal of all or part of ovary, n (%) | 20 (3.3) | 11 (2.8) | 1 (1.4) | 6 (7.1) | 2 (4.3) |
Depression at baseline, n (%) | | | | | |
Never | 409 (67.8) | 284 (71.0) | 57 (78.1) | 46 (54.8) | 22 (47.8) |
Past or current | 194 (32.2) | 116 (29.0) | 16 (21.9) | 38 (45.2) | 22 (52.2) |
Body mass index (kg/m2), n (%) | | | | | |
<20 | 83 (13.7) | 66 (16.5) | 6 (8.2) | 7 (8.3) | 4 (8.7) |
20–24 | 332 (55.1) | 228 (57.0) | 38 (52.1) | 46 (54.8) | 20 (43.5) |
25–29 | 120 (19.9) | 72 (18.0) | 13 (17.8) | 21 (25.0) | 14 (30.4) |
30+ | 68 (11.3) | 34 (8.5) | 16 (21.9) | 10 (11.9) | 8 (17.4) |
Smoking status, n (%) | | | | | |
Never | 330 (54.7) | 233 (58.3) | 38 (52.0) | 35 (41.7) | 24 (52.2) |
Past | 212 (35.2) | 130 (32.5) | 31 (42.5) | 37 (44.0) | 14 (30.4) |
Current | 61 (10.1) | 37 (9.2) | 4 (5.5) | 12 (14.3) | 8 (17.4) |
Marital status, n (%) | | | | | |
Ever married or partnered | | | | | |
No history divorce, separation, widowhood | 384 (63.7) | 275 (68.8) | 45 (61.6) | 44 (52.4) | 20 (43.5) |
History divorce, separation or widowhood | 127 (21.1) | 64 (16.0) | 17 (23.3) | 26 (30.9) | 20 (43.5) |
Never married or partnered | 92 (15.2) | 61 (15.2) | 11 (15.1) | 14 (16.7) | 6 (13.0) |
Sexual Identity, n (%) | | | | | |
Heterosexual | 537 (89.0) | 359 (89.7) | 69 (94.5) | 67 (79.8) | 42 (91.3) |
Gay, lesbian, or bisexual | 66 (11.0) | 41 (10.3) | 4 (5.5) | 17 (20.2) | 4 (8.7) |